<template>
  <div id="detail">
    <detail-nav-bar class="detail-nav" @titleClick="titleClick" ref="nav"/>
    <scroll class="content" ref="scroll" :probe-type="3" @scroll="contentScroll">
      <detail-swiper :top-images="topImages"/>
      <detail-base-info :goods="goods"/>
      <detail-shop-info :shop="shop"/>
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad"/>
      <detail-param-info ref="params" :param-info="paramInfo"/>
      <detail-comment-info ref="comment" :comment-info="commentInfo"/>
      <goods-list ref="recommend" :goods="recommends"/>
    </scroll>
    <detail-bottom-bar @addCart="addToCart"/>

    <back-top @click.native="backClick" v-show="isShowBack" style="margin-bottom: 10px"/>
<!--    <toast :message="message" :show="show"/>-->
  </div>
</template>

<script>
  import DetailNavBar from "./childComps/DetailNavBar"
  import DetailSwiper from "./childComps/DetailSwiper"
  import DetailBaseInfo from "./childComps/DetailBaseInfo"
  import DetailShopInfo from "./childComps/DetailShopInfo"
  import DetailGoodsInfo from "./childComps/DetailGoodsInfo"
  import DetailParamInfo from "./childComps/DetailParamInfo"
  import DetailCommentInfo from "./childComps/DetailCommentInfo"
  import DetailBottomBar from "./childComps/DetailBottomBar"

  import Scroll from "components/common/scroll/Scroll"
  import GoodsList from "components/content/goods/GoodsList"

  import {getDetail, getRecommend, Goods, GoodsParam, Shop} from "network/detail"
  import {itemListenerMixin, backTopMixin} from "common/mixin"
  import {debounce} from "common/utils"

  import {mapActions} from 'vuex'

  import Toast from "components/common/toast/Toast";

  export default {
    name: "Detail",
    components: {
      DetailNavBar,
      DetailSwiper,
      DetailBaseInfo,
      DetailShopInfo,
      DetailGoodsInfo,
      DetailParamInfo,
      DetailCommentInfo,
      DetailBottomBar,
      Scroll,
      Toast,
      GoodsList
    },
    mixins: [itemListenerMixin, backTopMixin],
    data() {
      return {
        iid: null,
        topImages: [],
        goods: {},
        shop: {},
        detailInfo: {},
        paramInfo: {},
        commentInfo: {},
        recommends: [],
        themeTopYs: [],
        getThemeTopY: null,
        currentIndex: 0,
        message: '',
        show: false
      }
    },
    created() {
      //1.获取iid
      this.iid = this.$route.params.iid

      //2.请求详情数据
      getDetail(this.iid).then(res => {
        // 1.获取顶部的图片轮播数据
        const data = res.result

        // 2.获取顶部的图片轮播数据
        this.topImages = data.itemInfo.topImages

        // 3.获取商品信息
        this.goods = new Goods(data.itemInfo, data.columns, data.shopInfo.services);

        // 4.创建店铺信息对象
        this.shop = new Shop(data.shopInfo)

        // 5.保存商品的详情数据
        this.detailInfo = data.detailInfo

        // 6.获取参数信息
        this.paramInfo = new GoodsParam(data.itemParams.info, data.itemParams.rule)

        // 7.取出评论信息
        if(data.rate.cRate != 0){
          this.commentInfo = data.rate.list[0]
        }
      }).catch(err => {
        console.log(err);
      })

      // 3.请求推荐数据
      getRecommend().then(res => {
        this.recommends = res.data.list
      }).catch(err => {
        console.log(err);
      })

      // 4.给getThemeTopY赋值
      this.getThemeTopY = debounce(() => {
        this.themeTopYs = []
        this.themeTopYs.push(0);
        this.themeTopYs.push(this.$refs.params.$el.offsetTop - 56);
        this.themeTopYs.push(this.$refs.comment.$el.offsetTop - 56);
        this.themeTopYs.push(this.$refs.recommend.$el.offsetTop - 56);
        this.themeTopYs.push(Number.MAX_VALUE)
      }, 200)
    },
    mounted() {},
    destroyed() {
      this.$bus.$off('itemImageLoad', this.itemImageListener)
    },
    methods: {
      ...mapActions(['addCart']),
      imageLoad() {
        this.$refs.scroll.refresh()
        this.getThemeTopY()
      },
      titleClick(index) {
        this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 200)
      },
      contentScroll(position) {
        // 1.获取Y值
        const positionY = - position.y

        // 2.positionY和主题中的值行对比
        let length = this.themeTopYs.length - 1
        for(let i = 0; i < length; i++) {
          if(this.currentIndex !== i && (positionY >= this.themeTopYs[i] && positionY < this.themeTopYs[i+1])) {
            this.currentIndex = i
            this.$refs.nav.currentIndex = this.currentIndex
          }
        }

        // 3.是否显示BackTop
        this.isShowBack = (-position.y) > 1000
      },

      // 4.
      addToCart() {
        //1. 获取购物车需要的商品信息
        const product = {}
        product.image = this.topImages[0]
        product.title = this.goods.title
        product.desc = this.goods.desc
        product.price = this.goods.realPrice
        product.iid = this.iid

        // 2.将商品添加到购物车
        // this.$store.commit('addCart', product)
        // this.$store.dispatch('addCart', product).then(res => {
        //   console.log(res)
        // })
        this.addCart(product).then(res => {
          // this.show = true
          // this.message = res
          // setTimeout(() => {
          //   this.show = false
          //   this.message = ''
          // }, 1000)
          this.$toast.show(res)
        })

        // 3.添加到购车成功

      }
    }
  }
</script>

<style scoped>
  #detail {
    position: relative;
    z-index: 9;
    background-color: #fff;
    height: 100vh;
    overflow:hidden;
  }

  .detail-nav {
    position: relative;
    z-index: 9;
    background-color: #fff;
  }

  .content {
    height: calc(100% - 93px);
  }
</style>
